Honorificabilitudinity

Once upon a time there was a boy whose name was...

Well, his father—whose name was Athanasius Christopher Maximilian Augustine Wolfeschlegelsteinhausenbergerdorff—was born in Taumatawhakatangihangakoauauotameteaturipukakapikimau-
ngahoronukupokaiwhenakitanatahu, New Zealand, and his mother—whose name was Caoilfhionn Eileánóir MacGhilleseatheanaich—was born in Llanfairpwllgwyngyllgogerychwyrndrobwllllantysiliogogogoch, Wales. The event of their marriage transpired approximately halfway between in Krungthepmahanakonbowornratanakosinmahintarayud-
yayamahadiloponoparatanarajthaniburiromudomrajniwesmahasat-
arnamornpimarnavatarsatitsakattiyavisanukamphrasit, Thailand, after his father attempted to circumexplorandiscover the world by a combined means of circumnavigation and circumambulation, which failed when he met Caoilfhionn. His brother's name is Marcellinus Alexander Nathaniel Johnathan, and his sisters' names are Francesca Gwendolyn Meredith Josephine and Cassandra Gabrielle Dominique Annabelle.

Their family is unusual, for they are the only ones in the world to express their surprise by saying Supercalifragilisticexpealidocious. They have a habit of floccinaucinihilipilification. Also, they are the only ones to have both acquired Numanoultramicroscopicsilicavolcanoconeosis and to suffer from Pseudopseudohypoparathyroidism.

Athanasius Wolfeschlegelsteinhausenbergerdorff is a scientist and works with chemicals. His children enjoy hearing him repeat them, but this is their favorite: methionylglutaminylarginyltyrosylglutamylserylleucylphenylalany-
lalanylglutaminylleucyllysylglutamylarginyllysylglutamylglycylal-
anylphenylalanylvalylprolylphenylalanylvalylthreonylleucylglycyla-
spartylprolylglycylisoleucylglutamylglutaminylserylleucyllysyliso-
leucylaspartylthreonylleucylisoleucylglutamylalanylglycylalanylas-
partylalanylleucylglutamylleucylglycylisoleucylprolylphenylalanyl-
serylaspartylprolylleucylalanylaspartylglycylprolylthreonylisoleu-
cylglutaminylasparaginylalanylthreonylleucylarginylalanylphenylal-
anylalanylalanylglycylvalylthreonylprolylalanylglutaminylcysteiny-
lphenylalanylglutamylmethionylleucylalanylleucylisoleucylarginyl-
glutaminyllysylhistidylprolylthreonylisoleucylprolylisoleucylglyc-
ylleucylleucylmethionyltyrosylalanylasparaginylleucylvalylphenyla-
lanylasparaginyllysylglycylisoleucylaspartylglutamylphenylalanylt-
yrosylalanylglutaminylcysteinylglutamyllysylvalylglycylvalylaspart-
ylserylvalylleucylvalylalanylaspartylvalylprolylvalylglutaminylglu-
tamylserylalanylprolylphenylalanylarginylglutaminylalanylalanylleu-
cylarginylhistidylasparaginylvalylalanylprolylisoleucylphenylalany-
lisoleucylcysteinylprolylprolylaspartylalanylaspartylaspartylaspa-
rtylleucylleucylarginylglutaminylisoleucylalanylseryltyrosylglycy-
larginylglycyltyrosylthreonyltyrosylleucylleucylserylarginylalany-
lglycylvalylthreonylglycylalanylglutamylasparaginylarginylalanyla-
lanylleucylprolylleucylasparaginylhistidylleucylvalylalanyllysylle-
ucyllysylglutamyltyrosylasparaginylalanylalanylprolylprolylleucyl-
glutaminylglycylphenylalanylglycylisoleucylserylalanylprolylaspar-
tylglutaminylvalyllysylalanylalanylisoleucylaspartylalanylglycyla-
lanylalanylglycylalanylisoleucylserylglycylserylalanylisoleucylva-
lyllysylisoleucylisoleucylglutamylglutaminylhistidylasparaginyliso-
leucylglutamylprolylglutamyllysylmethionylleucylalanylalanylleucyll-
ysylvalylphenylalanylvalylglutaminylprolylmethionyllysylalanylalany-
lthreonylarginylserine.

The children are fond of words, and always enjoy coming across a new one such as honorific­abilitud­initatibus or Lopado­temacho­selacho­galeo­kranio­leipsano­drim­hypotrimmato­silph-
io­paraomelito­katakechymeno­kichl­epi­kossypho­phatto­perister­alektr-
yon­opte­kephallio­kinklo­peleio­lagoio­siraio­baphe­tragano­pterygon.

Now, what is the boy's name?